水土相互作用与土细观结构变异的X射线衍射分析

Analysis of X-Ray Diffraction on Variation of Soil Ministructure and Interaction Between Groundwater and Soil

城市建设改变了水-土-电解质之间的平衡状态,地下水因扰动而日益“变异”,水土相互作用引发组分变异从而引发土结构发生变化.土结构应按三层次划分,即微观—细观—宏观结构,这样有利于甄别各自的作用与贡献,为此提出细观结构概念.通过构筑试验环境并进行X射线衍射测试,对原有衍射峰数、剩余衍射峰数、消失衍射峰数、新增衍射峰数分析发现,水土作用引发的结构变化来自于细观结构的变异,证实了在城市常温、常压、缓慢的地下水变异环境下,细观结构是水土相互作用发生、发展的“平台”及主要场所.

Balance among groundwater, soil and electrolyte are otten destroyed by city construction, so there is variation of environment and component in groundwater. Interaction between groundwater and soil can change soil structure strength because of the chemical component changes in groundwater. It is pointed out that soil structure can be classified into three kinds of microstructure, ministructure and macrostructure, so that their functions can be easily distinguished. By simulating experiment and X-ray diffraction, and experiment with original, residual, disappeared, increased numbers of diffraction spices, it is proved that the structure is due to the interaction between groundwater and soil under slow changing environment of groundwater in city district.